WO2019177258A1 - Appareil d'assistance d'ouverture/fermeture de disjoncteur - Google Patents

Appareil d'assistance d'ouverture/fermeture de disjoncteur Download PDF

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Publication number
WO2019177258A1
WO2019177258A1 PCT/KR2019/000858 KR2019000858W WO2019177258A1 WO 2019177258 A1 WO2019177258 A1 WO 2019177258A1 KR 2019000858 W KR2019000858 W KR 2019000858W WO 2019177258 A1 WO2019177258 A1 WO 2019177258A1
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WO
WIPO (PCT)
Prior art keywords
breaker
circuit breaker
temperature
state
thermal image
Prior art date
Application number
PCT/KR2019/000858
Other languages
English (en)
Korean (ko)
Inventor
이민제
김범열
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020180029586A external-priority patent/KR101986140B1/ko
Priority claimed from KR1020180029587A external-priority patent/KR102114211B1/ko
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to CN201980018148.9A priority Critical patent/CN111819651B/zh
Priority to EP19767093.8A priority patent/EP3767661A4/fr
Priority to US16/971,573 priority patent/US11776162B2/en
Publication of WO2019177258A1 publication Critical patent/WO2019177258A1/fr

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    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0003—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiant heat transfer of samples, e.g. emittance meter
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/04—Casings
    • G01J5/046—Materials; Selection of thermal materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/80—Calibration
    • G01J5/802—Calibration by correcting for emissivity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3275—Fault detection or status indication
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/90—Dynamic range modification of images or parts thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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    • G06T7/0002—Inspection of images, e.g. flaw detection
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    • G06T7/0008—Industrial image inspection checking presence/absence
    • G—PHYSICS
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    • G06T7/70—Determining position or orientation of objects or cameras
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    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/141—Control of illumination
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/56—Extraction of image or video features relating to colour
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077—Imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/80—Calibration
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10048—Infrared image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
    • H01H2011/0068—Testing or measuring non-electrical properties of switches, e.g. contact velocity measuring the temperature of the switch or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures

Definitions

  • the present invention relates to a circuit breaker opening and closing aid for identifying the temperature of the circuit breaker, and assisting the opening and closing operation of the circuit breaker based on the identified temperature.
  • the circuit breaker is connected between a power supply system and a load supplied with power from the system, and detects an overcurrent flowing in the load to cut off the power supply to the load.
  • the circuit breaker includes a relay for selectively opening and closing a circuit, and includes, for example, an OCR (Over Current Relay) driven by a mechanical contact, an EOCR (Electronic Over Current Relay) driven by a semiconductor contactless method, and the like.
  • OCR Over Current Relay
  • EOCR Electronic Over Current Relay
  • the circuit breaker selectively opens and closes the circuit by providing a control signal to the internal relay in accordance with the magnitude of the current flowing in the load.
  • An object of the present invention is to provide a circuit breaker opening and closing assist device that can improve the accuracy of the temperature measurement through the thermal image by correcting the thermal image of the circuit breaker according to the emissivity of the material constituting the circuit breaker.
  • an object of the present invention is to provide a circuit breaker opening and closing assistance device that can reflect the surface state of the material in correcting the thermal image by determining the emissivity of the material photographed in the visible image according to the color change rate of the visible image. It is done.
  • an object of the present invention is to provide a circuit breaker opening and closing assistance device that can determine whether the breaker breakdown by comparing the normal open state and the current open state of the breaker identified through the thermal image of the breaker.
  • the present invention assists the opening and closing operation of the circuit breaker based on the temperature detected through the thermal image of the circuit breaker, thereby providing a circuit breaker opening and closing assist device that can prevent the overcurrent generation and power supply interruption due to the breaker malfunction.
  • an object of the present invention is to provide a circuit breaker opening and closing aid that can improve the accuracy of the temperature measurement through the thermal image by compensating the temperature value detected through the thermal image for the circuit breaker.
  • an object of the present invention is to provide a circuit breaker opening and closing assistance device that can determine whether the breaker breakdown by comparing the normal open state and the current open state of the breaker identified through the thermal image of the breaker.
  • the present invention assists the opening and closing operation of the circuit breaker based on the temperature detected through the thermal image of the circuit breaker, thereby providing a circuit breaker opening and closing assist device that can prevent the overcurrent generation and power supply interruption due to the breaker malfunction.
  • the device for assisting opening and closing of the circuit breaker connected between the system and the load to obtain a visible image of the circuit breaker using a light source,
  • a material identification unit identifying a material photographed in the obtained visible image, an image corrector obtaining a thermal image of the breaker, and correcting the thermal image based on the emissivity of the identified material, the corrected heat Diagnosis of the breaker and the breaker to identify the normal operating state of the circuit breaker based on the temperature value detected in the image image, and to compare the identified normal operating state and the current operating state of the circuit breaker
  • the circuit breaker opening and closing assisting device is a device for assisting the opening and closing of the circuit breaker having a plurality of temperature sensors, the first temperature detected by the thermal image of the circuit breaker and the plurality of A compensator for compensating the temperature value of the thermal image by using the second temperature provided from a temperature sensor, and identifying a normal operating state of the circuit breaker based on the temperature value detected in the compensated thermal image,
  • a diagnosis unit for diagnosing a breaker of the breaker by comparing a normal operation state with a current operation state of the breaker, and a control unit generating a control signal according to whether the breaker breaks down and providing the generated control signal to the breaker. It is characterized by including.
  • the surface state of the material can be reflected in correcting the thermal image.
  • the present invention by assisting the opening and closing operation of the circuit breaker based on the temperature detected through the thermal image of the circuit breaker, it is possible to prevent the occurrence of overcurrent and interruption of power supply due to the breaker malfunction.
  • FIG. 1 is a view showing a circuit breaker opening and closing assistance device according to an embodiment of the present invention.
  • FIG. 2 is a view showing a state in which a breaker opening and closing assist device according to an embodiment of the present invention controls the breaker connected between the grid and the load.
  • FIG. 3 is a view showing an example of the circuit breaker shown in FIG.
  • FIG. 4 is a diagram illustrating an example of a visible image of a breaker.
  • FIG. 5 illustrates an example of a thermal image of a breaker.
  • FIG. 6 is a diagram showing color data detected at arbitrary coordinates of a visible image.
  • FIG. 9 is a view showing a state in which a thermal image is corrected according to emissivity.
  • FIG. 10 is a view showing a circuit breaker opening and closing aid according to another embodiment of the present invention.
  • FIG. 11 is a view showing a state in which a breaker opening and closing assist device according to another embodiment of the present invention controls the breaker connected between the grid and the load.
  • FIG. 12 is a diagram illustrating a thermal image photographing a plurality of measurement points set in a breaker
  • FIG. 13 is a diagram illustrating a method of adjusting a temperature reference value of a thermal image shown in FIG. 12 according to a compensation value.
  • 14 and 15 are graphs each showing a temperature value of a thermal image and a control signal generated based thereon over time;
  • the present invention relates to a circuit breaker opening and closing aid for identifying the temperature of the circuit breaker, and assisting the opening and closing operation of the circuit breaker based on the identified temperature.
  • the present invention corrects a thermal image of the circuit breaker based on the visible image of the circuit breaker, and assists the opening / closing operation of the circuit breaker based on the temperature identified through the corrected thermal image. Relates to a device.
  • the present invention relates to a circuit breaker opening and closing device for identifying a temperature of a circuit breaker based on a thermal image of a circuit breaker having a failure, and assisting the opening and closing operation of the circuit breaker based on the identified temperature.
  • a circuit breaker is connected between a power supply system and a load supplied with power from the system, and detects an overcurrent flowing in the load to cut off the power supply to the load.
  • the circuit breaker may include a relay for selectively opening and closing the circuit, and may include, for example, an over current relay (OCR) driven by a mechanical contact, an electronic over current relay (EOCR) driven by a semiconductor contactless method, and the like. have.
  • OCR over current relay
  • EOCR electronic over current relay
  • the circuit breaker opening and closing assist device to be described later can be connected to the circuit breaker described above to diagnose whether the circuit breaker is broken, and assist the circuit breaker in the event of a breaker breakdown.
  • circuit breaker opening and closing assisting apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 9.
  • FIG. 1 is a view showing a circuit breaker opening and closing assistive device according to an embodiment of the present invention
  • Figure 2 is a circuit breaker opening and closing assistive device according to an embodiment of the present invention controls the circuit breaker connected between the system and the load One drawing.
  • FIG. 3 is a diagram illustrating an example of the circuit breaker illustrated in FIG. 2.
  • FIG. 4 is a diagram illustrating an example of a visible image of a breaker
  • FIG. 5 is a diagram of an example of a thermal image of a breaker.
  • FIG. 6 is a diagram showing color data detected at arbitrary coordinates of a visible image
  • FIG. 7 is a diagram showing color space for RGB data
  • FIG. 8 is a diagram showing emissivity for arbitrary coordinates of a thermal image.
  • FIG. 9 is a diagram illustrating a state in which a thermal image is corrected according to emissivity.
  • the circuit breaker opening and closing assisting apparatus 100 may include a material identification unit 110, an image corrector 120, a diagnosis unit 130, and a controller 140. have.
  • the circuit breaker opening and closing assistance device 100 illustrated in FIG. 1 is exemplary, and its components are not limited to the embodiment shown in FIG. 1, and some components may be added, changed, or deleted as necessary.
  • Each component constituting the circuit breaker opening and closing assisting device 100 may include a processor and a memory, and may perform each function described below according to an operation of the processor using the memory. Alternatively, each component may perform a function described below by one main processor.
  • the circuit breaker opening / closing assistance device 100 may be connected to a circuit breaker 10 provided between the system 200 and the load 300.
  • the circuit breaker 10 is briefly illustrated, but as described above, the circuit breaker 10 may be configured in various forms to selectively open and close a circuit between the system 200 and the load 300. .
  • the breaker 10 may be an air circuit breaker (ACB) that performs a break operation through a fire protection method using air as an insulating material.
  • ACB air circuit breaker
  • the circuit breaker 10 may include an internal circuit (not shown) for performing a blocking operation in a case having an external interface.
  • the user may supply power to the circuit breaker 10 or stop the power supply through an external interface, monitor an operation state of the circuit breaker 10, or adjust the magnitude of the breaking current.
  • the material identification unit 110 may acquire a visible image 400 of the breaker 10 using a light source.
  • the substance identification unit 110 may receive a visual image 400 from the camera by performing data communication with a camera (not shown) installed inside or outside the circuit breaker opening / closing assistance device 100.
  • the camera is any camera that detects light reflected from the breaker 10 and may be a digital camera capable of data communication.
  • the substance identification unit 110 may control on / off, illuminance and angle of the light source.
  • the camera may generate the visible image 400 by detecting the light generated by the light source and reflected by the breaker 10.
  • the camera may be installed outside the breaker 10 to generate a visible image 400 by detecting light reflected from the outside of the breaker 10, or may be installed inside the breaker 10 to be reflected from the device inside the breaker 10.
  • the visible image 400 may be generated by detecting light.
  • the position of the camera is not limited thereto, and may be installed at any position capable of detecting light generated by the light source and reflected from the breaker 10.
  • the camera generates a visible image 400 of a portion where the bus bar 11 and the heat sink 12 are adjacent to each other and the generated visible image ( 400 may be provided to the substance identification unit 110.
  • the material identification unit 110 may identify a material photographed in the visible image 400.
  • the materials constituting the breaker 10 may have different colors. Accordingly, each material photographed in the visible image 400 may be expressed in different colors according to the type of material.
  • the substance identification unit 110 may identify the type of the substance photographed in the visible image 400 according to the color represented in the visible image 400.
  • the substance identification unit 110 may identify a substance photographed at each coordinate of the visible image 400 based on color data detected at each coordinate of the visible image 400.
  • the substance identification unit 110 may detect coordinates of an arbitrary measurement point in the visible image 400 and extract color data corresponding to the detected coordinates.
  • the visible image 400 may be divided into a grid, and each grid may have a coordinate.
  • the substance identification unit 110 sets coordinates of the first to fourth measurement points (X1, Y1), (X2, Y2), (X3, Y3), and (X4, Y4). ) Can be detected.
  • the substance identification unit 110 may extract color data represented by the detected coordinates.
  • the color data may include RGB (Red, Green, Blue) data, HSV (Hue Saturation Value) data, CMY (Cyan, Magenta, Yellow) data, YUV data, CMYK data, and the like. In the following description, the color data is assumed to be RGB data.
  • the substance identification unit 110 may extract the R (Red) component, the G (Green) component, and the B (Blue) component, respectively, of the color expressed in the coordinates of the measurement point, and collect the extracted components to detect color data. have.
  • the substance identification unit 110 may collect data about the R component, the G component, and the B component represented by the coordinates (X1, Y1) and detect the color data of the first measurement point as RGB 1.
  • the substance identification unit 110 collects data about the R component, the G component, and the B component represented by the coordinates (X2, Y2), (X3, Y3), and (X4, Y4). Color data of four measurement points can be detected as RGB 2, RGB 3 and RGB 4, respectively.
  • the substance identification unit 110 may identify the substance photographed at the corresponding coordinates based on the color data of each coordinate.
  • the substance identification unit 110 may identify the substance photographed at each coordinate by referring to the reference color data stored in the memory.
  • the reference color data may include information about a substance corresponding to the detected color data.
  • the reference color data may be stored in the memory in the form of a color table corresponding to any substance, or may be stored in the memory in the form of a color space corresponding to any substance.
  • the memory may store information about an RGB color space represented by a three-dimensional space according to the sizes of the R component, the G component, and the B component, and a material corresponding to an arbitrary position of the RGB color space. have.
  • the substance identification unit 110 is detected in the coordinates ((X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4) of the first to fourth measurement points described above in the RGB color space.
  • the positions of the color data RGB 1, RGB 2, RGB 3, and RGB 4 may be identified as C1 to C4, respectively.
  • a material corresponding to each position of the RGB color space may be stored in advance in the memory of the material identification unit 110 as shown in Table 1 below.
  • the substance identification unit 110 may identify the substance photographed at the coordinates X1 and Y1 of the first measurement point as M1 with reference to the memory, and may detect the substance photographed at the coordinates X2 and Y2 of the second measurement point.
  • the substance photographed at the coordinates X3 and Y3 of the third measuring point may be identified as M3, and the substance photographed at the coordinates X4 and Y4 of the fourth measuring point may be identified as M4.
  • the image corrector 120 may acquire a thermal image 500 of the circuit breaker 10.
  • the image corrector 120 may receive a thermal image 500 from the thermal imager by performing data communication with a thermal imager (not shown) installed inside or outside the circuit breaker opening and closing apparatus 100.
  • the thermal imaging camera may include any camera that senses heat generated by the breaker 10 and may include, for example, an infrared camera.
  • the thermal imaging camera may be installed outside the breaker 10 to detect heat generated from the outside of the breaker 10, or may be installed inside the breaker 10 to detect heat generated by a device inside the breaker 10. .
  • the thermal imaging camera may generate the thermal image 500 by using the heat radiated from the breaker 10. More specifically, the thermal imaging camera may generate the thermal image 500 by expressing the circuit breaker 10 in different colors according to the intensity of heat radiated from each part of the circuit breaker 10.
  • the breaker 10 represented in the thermal image 500 may be expressed in different colors according to the reference temperature range 520 of the thermal image 500.
  • the reference temperature range 520 may include temperature information according to the color represented in the thermal image 500.
  • the shooting range of the thermal imaging camera may be included in the shooting range of the camera described above. That is, the shooting range of the camera may include all the shooting ranges of the thermal imaging camera.
  • any portion of the breaker 10 represented in the thermal image 500 may be included in the above-described visible image 400.
  • the specific photographing area 510 represented in the thermal image 500 of FIG. 5 may be included in the visible image 400 of FIG. 4 (410 of FIG. 4).
  • the bus bar 11 is a conductor that supplies a large current to the load 300, and the temperature of the bus bar 11 is large when the magnitude of the current flowing in the load 300 increases. Can rise.
  • the heat sink 12 adjacent to the bus bar 11 is a conductor having a large surface area, and absorbs heat generated from the bus bar 11 to lower the temperature of the bus bar 11.
  • the temperature of the bus bar 11 may always be higher than the temperature of the heat sink 12.
  • the emissivity of the material constituting the heat sink 12 is greater than the emissivity of the material constituting the bus bar 11, as shown in FIG. 5, in the specific imaging area 510 of the thermal image 500, The temperature of the heat sink 12 may be expressed higher than the temperature of the bus bar 11.
  • the image corrector 120 may correct the thermal image 500 based on the emissivity of the substance identified by the substance identifier 110.
  • the image correction unit 120 detects a lower temperature of the corresponding material in the thermal image 500. 500 can be corrected.
  • the image correction unit 120 detects a high temperature of the corresponding material in the thermal image 500.
  • the thermal image 500 may be corrected.
  • the image corrector 120 may correct the thermal image 500 corresponding to each coordinate of the visible image 400 based on the emissivity of the identified material.
  • the photographing range of the thermal image 500 may be included in the photographing range of the visible image 400.
  • the coordinates of the visible image 400 with respect to a point of the breaker 10 may be the same as the coordinates of the thermal image 500.
  • the coordinates ((X1, Y1), (X2, Y2), (X3, Y3), (X4) of the first to fourth measurement points in the visible image 400 shown in FIG. , Y4)) may be the same as the coordinates of the first to fourth measurement points in the thermal image 500 illustrated in FIG. 8.
  • the visible image 400 and the thermal image 500 may share the same coordinate system, and the coordinates of one point of the breaker 10 may be the same in the visible image 400 and the thermal image 500. .
  • the image corrector 120 determines an emissivity of the substance identified at each coordinate of the visible image 400 with reference to the memory, and corrects color data for each coordinate of the thermal image 500 based on the determined emissivity. Can be.
  • Each material and the emissivity of the corresponding material may be stored in the form of a look up table (LUT) in the memory of the image corrector 120.
  • LUT look up table
  • the emissivity corresponding to each material may be stored in advance in the memory as shown in Table 2 below.
  • the image corrector 120 may determine the emissivity of the substance identified at each coordinate of the visible image 400 with reference to the memory.
  • the image correction unit 120 may determine the emissivity of the material M1 identified at the coordinates X1 and Y1 of the first measurement point as e1, and the material identified at the coordinates X2 and Y2 of the second measurement point.
  • the emissivity of (M2) can be determined as e2 and the emissivity of the material M3 identified at the coordinates (X3, Y3) of the third measuring point can be determined as e3 and identified at the coordinates (X4, Y4) of the fourth measuring point.
  • the emissivity of the material M4 can be determined as e4.
  • the material identification unit 110 detects the color change rate of the visible image 400 according to the movement of the light source
  • the image correction unit 120 is the color of the material and the visible image 400 captured in the visible image 400
  • the emissivity of a substance can also be determined based on the rate of change.
  • the material identification unit 110 may control the light source. More specifically, the material identification unit 110 may control the angle of the light source or the position of the light source, and the camera may generate the visible image 400 according to the movement of the light source.
  • the camera may provide a visible image 400 generated within a continuous time at which the light source moves to the material identification unit 110.
  • the substance identification unit 110 may identify the substance photographed at each coordinate of the visible image 400 based on the visible image 400 originally provided from the camera.
  • the material identification unit 110 may receive a plurality of visible images 400 according to the movement of the light source from the camera, and detect a color change rate according to the movement of the light source with respect to arbitrary coordinates of the visible image 400. .
  • Any material may change its emissivity depending on its surface state. More specifically, when the surface state is smooth, even the same material may have a relatively high emissivity. On the other hand, if the surface condition is rough, even the same material may have a relatively low emissivity.
  • the emissivity may be relatively high even with the same material.
  • the surface condition is rough, since the reflectance of the light generated from the light source due to the diffuse reflection, etc. is relatively low, even the same material may have a relatively low emissivity.
  • the image corrector 120 may determine the emissivity of the material based on the color change rate detected by the material identifier 110.
  • the image corrector 120 may determine the emissivity range of the material photographed in the visible image 400 with reference to the memory, and determine the emissivity included in the emissivity range based on the color change rate.
  • the emissivity of the material M5 photographed at an arbitrary coordinate of the visible image 400 may be stored in advance in the memory as shown in Table 3 below.
  • the image corrector 120 may determine the emissivity range of the material with respect to the material M5 as e5 to e6 with reference to the memory.
  • a maximum and minimum color change rate for each material may be stored in advance in the memory, and the image corrector 120 may correspond to the color change rate of the material M5 determined in a section between the maximum color change rate and the minimum color change rate.
  • the emissivity of can be determined.
  • the image corrector 120 may detect the color change rate of the material M5 and determine the emissivity of the material M5 in correspondence with the detected color change rate and the ratio of the maximum color change rate and the minimum color change rate of the material M5.
  • the color change rate of the material M5 identified through the visible image 400 may be R1 + 0.8 (R2-R1). .
  • the image corrector 120 may determine the emissivity of the material M5 as e5 + 0.8 (e6-e5) in proportion to the color change rate of the material M5 determined in the interval between the maximum color change rate and the minimum color change rate.
  • the present invention may reflect the surface state of the material in correcting the thermal image by determining the emissivity of the material photographed in the visible image according to the color change rate of the visible image.
  • the image corrector 120 may correct color data for each coordinate of the thermal image 500.
  • the emissivity of the material photographed at each coordinate may be determined at each coordinate of the thermal image 500.
  • the image corrector 120 may correct color data of each coordinate of the thermal image 500 according to an emissivity determined for each coordinate.
  • the image corrector 120 may provide an emissivity control signal to the thermal imaging camera so as to control the thermal imaging camera to change the basic emissivity set at each coordinate of the thermal image 500 to an emissivity determined according to each material.
  • the image correction unit 120 may change the color data for each coordinate of the thermal image 500 according to the emissivity determined for each material without performing communication with the thermal imaging camera.
  • the method of correcting the thermal image 500 according to the emissivity may be performed according to various methods used in the art.
  • the pre-correction thermal image 500 may include a person 530 and concrete 540.
  • the emissivity of the person 530 may be determined as, for example, 0.98
  • the emissivity of the concrete 540 may be determined as, for example, 0.8.
  • the image corrector 120 may generate the corrected thermal image 500 'by correcting color data corresponding to each coordinate of the thermal image 500 based on the determined emissivity.
  • the present invention can improve the accuracy of temperature measurement through the thermal image by correcting the thermal image of the circuit breaker according to the emissivity of the material constituting the circuit breaker.
  • the diagnosis unit 130 identifies the normal operating state of the circuit breaker 10 based on the detected temperature value (hereinafter, detected temperature value) in the corrected thermal image 500 ', and identifies the normal operating state and the breaker ( It is possible to diagnose whether the breaker 10 is broken by comparing the current operating state of 10).
  • the normal operation state may mean a normal opening / closing state of the circuit breaker 10 within a temperature condition detected by the corrected thermal image 500 '.
  • the temperature of the circuit breaker 10 may increase as the current supplied to the load 300 increases in a range in which the circuit breaker 10 does not block the current supplied to the load 300.
  • the detection temperature value at the instant when the current supplied to the load 300 becomes an overcurrent will be described as a limit temperature.
  • the breaker 10 defines the state of providing the power of the system 200 to the load 300 as a closed state, the open state of blocking the power of the system 200 is provided to the load 300 Defined as
  • the breaker 10 when the breaker 10 is normally operated, if the detected temperature value is less than the limit temperature, the breaker 10 may be controlled to a closed state. On the contrary, when the detected temperature value is greater than or equal to the limit temperature, the breaker 10 may be controlled in an open state.
  • the normal operation state of the circuit breaker 10 according to the detected temperature value may be stored in advance in the memory. More specifically, the normal operation state of the breaker 10 according to the temperature value detected at any measurement point of the breaker 10 may be stored in the memory.
  • the diagnosis unit 130 may identify a normal operating state of the cooler according to the detected temperature value with reference to the memory.
  • the memory may store in advance a limit temperature for any measurement point of the circuit breaker 10 when an overcurrent flows in the load 300.
  • the diagnosis unit 130 may identify the normal operation state of the circuit breaker 10 as the closed state when the detected temperature value is less than the threshold temperature. On the other hand, the diagnosis unit 130 may identify the normal operation state of the circuit breaker 10 as an open state when the detected temperature value is greater than or equal to the threshold temperature.
  • the diagnosis unit 130 may determine whether an overcurrent has occurred in the load 300 based on the detected temperature value of any measurement point of the breaker 10, and may determine whether the overcurrent has occurred. Normal open and close states can be identified.
  • the above-described detection temperature value may be a temperature value detected at any point (coordinate) of the temperature values detected in the thermal image 500 '.
  • the detection temperature value may be a maximum temperature value having a maximum size among temperature values detected in the thermal image 500 '.
  • the diagnosis unit 130 may identify the maximum temperature value among the temperature values detected in the thermal image 500 ', and identify the normal operating state of the circuit breaker 10 based on the identified maximum temperature value. .
  • the diagnosis unit 130 may diagnose whether the breaker 10 is broken by comparing the identified normal operation state with the current operation state of the breaker 10.
  • the current operating state of the circuit breaker 10 may mean a current open / close state of the circuit breaker 10.
  • the diagnosis unit 130 may receive operation state information of the circuit breaker 10 from the circuit breaker 10, and identify a current operation state of the circuit breaker 10 based on the provided operation state information.
  • the diagnosis unit 130 may diagnose whether the breaker 10 is broken according to whether the normal operation state matches the current operation state of the breaker 10.
  • both the normal operating state and the current operating state mean the open / close state of the circuit breaker 10, it may be an open state or a closed state.
  • the diagnosis unit 130 may diagnose whether the breaker 10 is broken by comparing whether the normally open / closed state of the breaker 10 and the current open / close state of the breaker 10 are identified according to the detected temperature value.
  • the diagnosis unit 130 may determine that an overcurrent does not flow in the load 300 when the detected temperature value is less than the threshold temperature, and determine the normal operation state of the circuit breaker 10 as the closed state. At this time, the current opening and closing state of the breaker 10 which is normally operated may be a closed state, but the current opening and closing state of the breaker 10 in which a failure occurs may be an open state.
  • the diagnosis unit 130 may determine that an overcurrent flows in the load 300 when the detected temperature value is greater than or equal to the threshold temperature, and determine the normal operation state of the circuit breaker 10 as the open state.
  • the current opening and closing state of the breaker 10 which is normally operated may be an open state, but the current opening and closing state of the breaker 10 in which a failure occurs may be a closed state.
  • the diagnosis unit 130 may diagnose the breaker 10 as a normal state when the normal operating state and the current operating state match, and diagnose the breaker 10 as a fault state when the normal operating state and the current operating state are different. have.
  • the present invention can determine whether the breaker is broken by comparing the normal open state and the current open state of the breaker identified through the thermal image of the breaker.
  • the controller 140 may receive information on whether the breaker 10 is broken from the above-described diagnosis unit 130, generate a control signal according to whether the breaker 10 is broken, and provide the breaker 10 to the breaker 10. .
  • the control signal may be a signal for controlling the opening and closing of the breaker 10.
  • the controller 140 may generate a control signal when the circuit breaker 10 is diagnosed as a failure state and provide the generated control signal to the circuit breaker 10. In other words, the controller 140 may not generate a control signal when the circuit breaker 10 is diagnosed as a normal state, but may generate a control signal only when the circuit breaker 10 is diagnosed as a faulty state.
  • the circuit breaker 10 may perform the opening and closing operation according to the control signal.
  • the control signal may include an open control signal and a close control signal.
  • the open control signal may be a signal for controlling the current open / close state of the breaker 10 in the open state
  • the close control signal may be a signal for controlling the current open / close state of the breaker 10 in the closed state.
  • the controller 140 may provide an open control signal to the breaker 10 when the normal operation state of the breaker 10 is an open state and the current operation state of the breaker 10 is a closed state.
  • the controller 140 may provide the close control signal to the breaker 10.
  • the present invention assists the opening and closing operation of the circuit breaker based on the temperature detected through the thermal image of the circuit breaker, thereby preventing overcurrent generation and power supply interruption due to the circuit breaker malfunction.
  • the present invention can generate a control signal and provide it to the breaker so that the breaker can operate normally.
  • FIG. 10 is a view showing a circuit breaker opening and closing assistive device according to another embodiment of the present invention
  • Figure 11 is a circuit breaker opening and closing assisting device according to another embodiment of the present invention controls the circuit breaker connected between the grid and the load One drawing.
  • FIG. 12 is a diagram illustrating a thermal image captured by a plurality of measurement points set in a circuit breaker
  • FIG. 13 is a diagram illustrating a method of adjusting a temperature reference value of the thermal image shown in FIG.
  • 14 and 15 are graphs showing temperature values of a thermal image and a control signal generated based on the time, respectively.
  • the circuit breaker opening / closing assistance device 100 ′ may include a compensator 110 ′, a diagnosis unit 120 ′, and a controller 130 ′.
  • the breaker opening and closing assisting device 100 ′ shown in FIG. 10 is exemplary, and its components are not limited to the embodiment shown in FIG. 10, and some components may be added, changed, or deleted as necessary. .
  • Each component constituting the circuit breaker opening and closing assisting device 100 ′ may include a processor and a memory, and may perform each function described below according to an operation of the processor using the memory. Alternatively, each component may perform a function described below by one main processor.
  • the breaker opening and closing assisting device 100 ′ may be connected to the breaker 10 provided between the system 200 and the load 300. Since the circuit breaker 10 has been described with reference to FIGS. 1 to 9, a detailed description thereof will be omitted.
  • the compensator 110 ′ may detect the first temperature based on the thermal image 500 of the circuit breaker 10.
  • the compensator 110 ′ may receive a thermal image 500 from the thermal imager by performing data communication with a thermal imaging camera (not shown) installed inside or outside the circuit breaker opening / closing assistance device 100 ′.
  • the thermal imaging camera may include any camera that senses heat generated by the breaker 10 and may include, for example, an infrared camera.
  • the thermal imaging camera may be installed outside the breaker 10 to detect heat generated from the outside of the breaker 10, or may be installed inside the breaker 10 to detect heat generated in an internal circuit of the breaker 10. .
  • the position of the thermal imaging camera is not limited thereto, and may be determined differently according to the position of the measurement point described later.
  • the thermal imaging camera may generate the thermal image 500 by using the heat radiated from the breaker 10. More specifically, the thermal imaging camera may generate the thermal image 500 by expressing the circuit breaker 10 in different colors according to the intensity of heat radiated from each part of the circuit breaker 10.
  • the circuit breaker 10 represented in the thermal image 500 may be expressed in different colors according to a reference temperature range of the thermal image 500.
  • the reference temperature range may be set to a range between the maximum temperature reference value 550 and the minimum temperature reference value 560.
  • the location When the temperature of one location of the breaker 10 is the maximum temperature reference value 550, the location may be represented in white in the thermal image 500, and the temperature of the other location of the subject is the minimum temperature reference value 560. ), The location may be represented in black in the thermal image 500.
  • the corrector may receive the thermal image 500 from the thermal imager, and detect the first temperature of the circuit breaker 10 through the color expressed in the thermal image 500.
  • the correction unit may refer to the color of each part of the breaker 10 represented in the thermal image 500 and the color defined in the reference temperature range of the corresponding thermal image 500, and thus, the correction part The first temperature can be detected.
  • the measuring point may mean a position where the temperature is to be measured, for example, a specific position included in the internal circuit of the circuit breaker 10, a contact position of the circuit breaker 10, a position of a bus bar, a circuit breaker ( 10) any position of the outer case, and the like.
  • the compensator 110 ′ may detect coordinates of the measurement point on the thermal image 500 and detect a first temperature corresponding to the detected coordinates.
  • Each point represented on the thermal image 500 may have a coordinate according to a position at which the horizontal axis X and the vertical axis Y cross each other in the thermal image 500.
  • a plurality of measuring points for example, first to fourth measuring points A1 to A4, may be preset in the circuit breaker 10, and the compensator 110 ′ may include a thermal image 500. Coordinates of the measuring points can be detected from each point of the breaker 10 represented on the image.
  • the compensator 110 ′ sets the coordinates of the first to fourth measurement points A1 to A4 to (U1, V1), (U2, V2), (U3, V3), and (U4, V4), respectively. Can be detected.
  • the compensator 110 ′ may detect the first temperature corresponding to the detected coordinates for each measurement point.
  • the compensator 110 ′ may compare the color of the (U1, V1) coordinates with the reference temperature range to determine a temperature corresponding to the (U1, V1) coordinates, and determine the detected temperature as the first measurement point A1. Can be detected at the first temperature. In this manner, the compensator 110 ′ may determine the temperature corresponding to each coordinate by comparing the colors of the coordinates (U2, V2), (U3, V3), and (U4, V4) with a reference temperature range. The obtained temperature can be detected as the first temperature of the second to fourth measurement points A2 to A4.
  • the compensator 110 ′ may compensate for the temperature value of the thermal image 500 by using the first temperature and the second temperature provided from the plurality of temperature sensors.
  • the circuit breaker 10 may be provided with a plurality of temperature sensors.
  • the temperature sensor may be an analog temperature sensor such as a thermistor or may be a digital temperature sensor.
  • the plurality of temperature sensors may be installed at an arbitrary position of the circuit breaker 10 to measure a second temperature which is a temperature of the corresponding position.
  • the plurality of temperature sensors are installed in a specific position included in the internal circuit of the circuit breaker 10, the contact position of the circuit breaker 10, the position of the bus bar, the case of the circuit breaker 10, and the second of each position. The temperature can be measured.
  • the plurality of temperature sensors may be provided at at least one measuring point described above to measure the second temperature of each measuring point.
  • a plurality of temperature sensors may be provided at the first to fourth measurement points A1 to A4 illustrated in FIG. 12, and the plurality of temperature sensors may be configured to have a second temperature at the first to fourth measurement points A1 to A4. Can be measured.
  • the compensator 110 ′ may receive the second temperature of each measurement point from the plurality of temperature sensors and compensate the temperature value of the thermal image 500 by using the first temperature and the second temperature.
  • the temperature sensor is installed at each measuring point to directly measure the temperature of the measuring point, and the thermal image 500 indirectly measures the temperature of each measuring point using infrared rays, so the accuracy of the temperature measurement is measured by the temperature sensor.
  • the second temperature may be higher than the first temperature detected based on the thermal image 500.
  • the compensator 110 ′ may compensate the temperature value of the thermal image 500 so that the first temperature follows the second temperature.
  • the compensator 110 ′ determines the compensation value using the first temperature and the second temperature for the plurality of measurement points set in the circuit breaker 10, and uses the determined compensation value to determine the thermal image 500.
  • the temperature value of can be compensated for.
  • the compensation value may be determined as an average value of the difference between the first temperature and the second temperature.
  • the compensator 110 ′ may identify the first temperatures of the first to fourth measurement points A1 to A4 as T1, T2, T3, and T4 using the thermal image 500. Can be.
  • the second temperatures of the first to fourth measurement points A1 to A4 provided from the plurality of temperature sensors may be T1 ', T2', T3 ', and T4', respectively.
  • the compensation value (Q) may be calculated by Equation 1 below.
  • the compensation unit 110 ′ may determine the average value of the value obtained by subtracting the first temperature from the second temperature with respect to the first to fourth measurement points A1 to A4 as a compensation value.
  • the compensation unit 110 ′ may compensate the temperature value of the thermal image 500 by adding the compensation value to the temperature reference value of the thermal image 500.
  • the compensator 110 ′ resets the reference temperature range of the thermal image 500 by adding the compensation value to the maximum temperature reference value 550 and the minimum temperature reference value 560 of the thermal image 500, respectively. Can be.
  • the maximum temperature reference value 550 and the minimum temperature reference value 560 before compensation of the compensator 110 ′ may be 66 degrees and 58.7 degrees, respectively, and thus the reference temperature range may be set to 58.7 to 66 degrees. Can be.
  • the compensator 110 ′ adds the compensation value Q to the existing maximum temperature reference value 550 and the minimum temperature reference value 560, respectively, and adds the maximum temperature reference value 550 to 66 + Q degrees and the minimum temperature reference value 560. Can be set to 58.7 + Q degrees. Accordingly, the reference temperature range may be set to 58.7 + Q ⁇ 66 + Q degrees.
  • the temperature value of the compensated thermal image 500 may be detected to be higher than the temperature before the compensation operation.
  • the present invention may improve the accuracy of temperature measurement through the thermal image by compensating the temperature value detected through the thermal image of the circuit breaker.
  • the diagnosis unit 120 ′ identifies the normal operation state of the circuit breaker 10 based on the detected temperature value (hereinafter, detected temperature value, T CB ) in the compensated thermal image 500. can do.
  • the normal operation state may mean a normal opening / closing state of the circuit breaker 10 within a temperature condition detected by the compensated thermal image 500.
  • the detection temperature value T CB at the instant when the current supplied to the load 300 becomes an overcurrent is defined and defined as the limit temperature T max .
  • the breaker 10 defines the state of providing the power of the system 200 to the load 300 as a closed state, the open state of blocking the power of the system 200 is provided to the load 300 It is defined as
  • the normal operating state of the circuit breaker 10 according to the detected temperature value T CB may be stored in advance in the memory. More specifically, the normal operation state of the circuit breaker 10 according to the temperature value detected at any measurement point may be stored in the memory.
  • the diagnosis unit 120 ′ may identify a normal operating state of the circuit breaker 10 according to the detection temperature value T CB with reference to the memory.
  • a limit temperature T max for an arbitrary measuring point when an overcurrent flows in the load 300 may be stored in advance, and the diagnosis unit 120 ′ may detect the detected temperature value T CB as the limit temperature T max. In comparison, the normal operation state of the circuit breaker 10 can be identified.
  • the detection temperature value T CB may gradually increase from a time point t 1 at which the load 300 is driven to exceed the limit temperature T max at a specific time point t 2 .
  • the diagnosis unit 120 ′ may identify a normal operating state of the breaker 10 as a closed state in a section of 0 to t 2 , and identify a normal operating state of the breaker 10 as an open state in a section of t 2 or more. You can.
  • the diagnosis unit 120 ′ may determine whether an overcurrent has occurred in the load 300 based on the detected temperature value T CB of an arbitrary measuring point of the breaker 10, and according to whether the overcurrent occurs.
  • the normal open / close state of the breaker 10 can be identified.
  • diagnosis unit 120 ′ may identify the normal operation state based on the change amount of the detection temperature value T CB .
  • the amount of change in the detected temperature value (T CB) may indicate the amount of change with respect to the detected temperature value (T CB) is the unit time for any measuring point of the circuit-breaker (10).
  • the detection temperature value T CB may also increase rapidly. At this time, if the amount of change in the detected temperature value T CB is equal to or greater than a preset maximum change amount, the diagnostic unit 120 ′ may overcurrent the load 300 even when the detected temperature value T CB is less than the limit temperature T max . Can be determined to flow.
  • the maximum change amount of the detected temperature value T CB for any measurement point may be stored in advance in the memory, and the diagnosis unit 120 ′ may compare the temperature change amount and the maximum change amount of the detected temperature value T CB with reference to the memory. Normal operation status can be identified.
  • the diagnosis unit 120 ′ may identify the normal operation state of the circuit breaker 10 as the closed state if the temperature change amount of the detection temperature value T CB is less than the maximum change amount. On the other hand, if the temperature change amount of the detection temperature value T CB exceeds the maximum change amount, the normal operation state of the circuit breaker 10 may be identified as an open state.
  • the diagnosis unit 120 ′ may diagnose the breaker 10 by comparing the identified normal operation state with the current operation state of the breaker 10.
  • the current operating state of the breaker 10 may mean a current open state of the breaker 10.
  • the diagnosis unit 120 ′ may receive operation state information of the breaker 10 from the breaker 10, and may identify a current operation state of the breaker 10 based on the provided operation state information.
  • the diagnosis unit 120 ′ may diagnose whether the breaker 10 is broken according to whether the normal operation state matches the current operation state of the breaker 10.
  • both the normal operating state and the current operating state mean the open / close state of the circuit breaker 10, it may be an open state or a closed state.
  • the diagnosis unit 120 ′ compares the normal opening / closing state of the breaker 10 and the current opening / closing state of the breaker 10 identified according to the detected temperature value T CB to diagnose whether the breaker 10 is broken. Can be.
  • the diagnosis unit 120 ′ determines that an overcurrent does not flow in the load 300 when the detected temperature value T CB is less than the threshold temperature T max , thereby closing the normal operating state of the circuit breaker 10. Judging by At this time, the current opening and closing state of the breaker 10 which is normally operated may be a closed state, but the current opening and closing state of the breaker 10 in which a failure occurs may be an open state.
  • the diagnosis unit 120 ′ may determine that an overcurrent flows in the load 300 when the detected temperature value T CB is greater than or equal to the threshold temperature T max to determine the normal operating state of the circuit breaker 10 as an open state. Can be. At this time, the current opening and closing state of the breaker 10 which is normally operated may be an open state, but the current opening and closing state of the breaker 10 in which a failure occurs may be a closed state.
  • the diagnosis unit 120 ′ diagnoses the breaker 10 as a normal state when the normal operating state and the current operating state match, and diagnoses the breaker 10 as a fault state when the normal operating state and the current operating state are different. Can be.
  • the above-described detection temperature value T CB may be a temperature value detected at any point among the temperature values detected in the thermal image 500.
  • the detection temperature value T CB may be a maximum temperature value having a maximum size among temperature values detected in the thermal image 500.
  • the diagnosis unit 120 ′ may identify a maximum temperature value among the temperature values detected in the thermal image 500, and identify a normal operating state of the circuit breaker 10 based on the identified maximum temperature value. .
  • each point of the thermal image 500 may have a different temperature, and thus may be expressed in different colors.
  • the diagnosis unit 120 ′ identifies the coordinates of the point having the maximum temperature on the thermal image 500, that is, the point that is expressed closest to white, and identifies the maximum temperature value corresponding to the identified coordinates. can do.
  • the diagnosis unit 120 ′ may identify the normal operating state of the circuit breaker 10 by comparing the identified maximum temperature value with the limit temperature T max , and identify the normal operating state of the circuit breaker 10 and the current operating state of the circuit breaker 10. By comparing the failure of the breaker 10 can be diagnosed.
  • the diagnosis unit 120 ′ may diagnose the breaker 10 as an open failure state when the normal operation state is the open state and the current operation state is the closed state. On the contrary, when the normal operation state is the closed state and the current operation state is the open state, the diagnosis unit 120 ′ may diagnose the breaker 10 as the closed failure state.
  • the open failure state may mean a state in which the breaker 10 is not switched to the open state
  • the closed failure state may mean a state in which the breaker 10 is not switched to the closed state
  • the diagnostic unit 120 may diagnose the breaker 10 as an open failure state.
  • the breaker 10 should be controlled to the closed state.
  • the diagnosis unit 120 ′ The diagnosing the breaker 10 as a closed failure state.
  • the present invention compares the normal open / closed state of the breaker identified through the thermal image of the breaker and can determine whether the breaker is broken.
  • the controller 130 ′ receives information on whether the breaker 10 has failed from the above-described diagnosis unit 120 ′, and controls the control signal Sc according to whether the breaker 10 has failed. It can be generated and provided to the breaker 10.
  • the control signal Sc is a signal for controlling the opening and closing of the breaker 10 and may be a digital signal or an analog pulse signal.
  • the controller 130 ′ may generate the control signal Sc and provide the generated control signal Sc to the breaker 10 when the breaker 10 is diagnosed as a failure state.
  • the controller 130 ′ does not generate the control signal Sc when the circuit breaker 10 is diagnosed as a normal state, and generates the control signal Sc only when the circuit breaker 10 is diagnosed as a failure state. Can be.
  • the circuit breaker 10 may perform an opening / closing operation according to the control signal Sc.
  • the control signal Sc may include an open control signal and a close control signal.
  • the open control signal may be a signal for controlling the current open / close state of the breaker 10 in the open state
  • the close control signal may be a signal for controlling the current open / close state of the breaker 10 in the closed state.
  • the controller 130 ′ may generate an open control signal when the breaker 10 is diagnosed as an open fault state, and generate a closed control signal to provide the breaker 10 when the breaker 10 is diagnosed as a closed fault state. .
  • the diagnosis unit 120 ′ may identify the normal operation state of the circuit breaker 10 as a closed state in a section of 0 to t 2 , and the circuit breaker in a section of t 2 or more.
  • the normal operating state of 10) can be identified as an open state.
  • the controller 130 ′ may generate a close control signal having a high pulse (size 1).
  • the controller 130 ′ may generate an open control signal having a low pulse (size 0).
  • the breaker 10 When the control signal Sc generated as described above is provided to the breaker 10, the breaker 10 may be controlled to a closed state according to a high pulse, and may be controlled to an open state according to a low pulse.
  • the present invention assists the opening / closing operation of the circuit breaker based on the temperature detected through the thermal image of the circuit breaker, thereby preventing overcurrent generation and power supply interruption due to the circuit breaker malfunction.

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Abstract

La présente invention concerne un appareil d'assistance d'ouverture/fermeture de disjoncteur pour corriger une image thermique d'un disjoncteur sur la base d'une image visible du disjoncteur, et pour assister une opération d'ouverture/fermeture du disjoncteur pertinent sur la base d'une température identifiée par l'intermédiaire de l'image thermique corrigée. En outre, la présente invention concerne un appareil d'assistance d'ouverture/fermeture de disjoncteur pour identifier une température d'un disjoncteur dans lequel une défaillance s'est produite, sur la base d'une image thermique du disjoncteur, et pour assister une opération d'ouverture/fermeture du disjoncteur pertinent sur la base de la température identifiée.
PCT/KR2019/000858 2018-03-14 2019-01-21 Appareil d'assistance d'ouverture/fermeture de disjoncteur WO2019177258A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201980018148.9A CN111819651B (zh) 2018-03-14 2019-01-21 断路器开闭辅助装置
EP19767093.8A EP3767661A4 (fr) 2018-03-14 2019-01-21 Appareil d'assistance d'ouverture/fermeture de disjoncteur
US16/971,573 US11776162B2 (en) 2018-03-14 2019-01-21 Circuit breaker opening/closing assistance apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2018-0029587 2018-03-14
KR1020180029586A KR101986140B1 (ko) 2018-03-14 2018-03-14 차단기 개폐 보조 장치
KR1020180029587A KR102114211B1 (ko) 2018-03-14 2018-03-14 차단기 개폐 보조 장치
KR10-2018-0029586 2018-03-14

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WO2019177258A1 true WO2019177258A1 (fr) 2019-09-19

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EP (1) EP3767661A4 (fr)
CN (1) CN111819651B (fr)
WO (1) WO2019177258A1 (fr)

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US11776162B2 (en) 2023-10-03
EP3767661A1 (fr) 2021-01-20
CN111819651B (zh) 2022-10-21
US20200388027A1 (en) 2020-12-10
EP3767661A4 (fr) 2021-07-21
CN111819651A (zh) 2020-10-23

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